Blender and Post Processing

Well, this is tutorial on some way you could use Blender. Let's assume we have some image (not necessary render)where we we want to add some glow effect and we don't have Photoshop, Gimp or any other program for raster image manipulation... We have only Blender 2.5 alpha 2 (well if we have Blender 2.49 it also could be used). Ok Let's start.

Above you see our basic image (I'v made it in Blender specially for the tutorial, but almost any other image could be used to).
Open Blender.

Then switch to the Node Editor window (look at the image above).
You'll see Blender node editor one of very powerful tools Blender could use. What are nodes ?
You could find some basic info here
http://www.blender.org/development/release-logs/blender-242/blender-composite-nodes/
Look at image below and make everything what is said there.

Now we need to input our image to Blender. Click Shift+A and choose Image node from the dialog. See image below

After that choose your Image from Open dialog and adjust dimension.

Here interesting part starts. With Shift+D duplicate image node. Then click Shift+A and select mix node (color->mix) . Click Shift+A again and add Blur node (filter->Blur). Click Shift+A yet one more time and add HSV node (color->Hue Saturation Value ). Some Nodes will join automatically. It's not important as we will join them in right way later.

Let's see how final setup looks like.

What happens here ? We have to images which we compose like usual layer in such programs like Gimp or Photoshop. To first layer we add Blur. Then we adjust colors with HSV. Everything is clear I think.
Before render result you have to be sure that in Render tab in Post Processing Composition is Switched On. I'm not sure that it is, by default. After that you could push F12 button and then look at result. If you like it then you could save it, if no then change something in node setup.
Let's look at my final result.

NB!Blender 2.5 alpha had crashed many times while I was making this tutorial (don't forget it's alpha). So if you try to use it push Shift+W sometimes ).
Uf, Well it is my first tutorial and I'm rather tired.
By the way, how is my english ?
I hope this tutorial will be useful.

Football

Without good modell you'll never have good render.
So this post is about modeling. Here is my model of soccer ball with simple render. Both the model and render are made in Blender 2.49b

To create it I've used icosphere with 2 subdivisions. After that I've used multiresolution. Then painted pentagons in black color (I've set new material for them). Maybe it was a mistake.Perhaps it was better to set new material in the end.
After that you need to use subsurface and extrude all pentagons and geksagons one by one on the same length (I've extruded them on 0.01 unit). It's rather boring part of work. That last idea I've found in tutorial here
http://limn.0fees.net/2008/06/12/blender-3d-soccer-ball-football-tutorial/#more-6
Thanks for the tutorial to the author)

Some experiments with new possibilities of Blender 2.5.alpha 2. It's alpha so it is has many bugs and of course not all new features are integrated. Maybe it would be interesting.
I'v used simple scene with one point light in it.

This is usual render.

This is usual render without ray tracing. It's of course the fastest form of render, so not very useful.

OK. Ambient occlusion. Multiply. Raytrace. Absolutely nothing interesting about it, except noise have appeared.

Ambient occlusion. Multiply. Approximate.
Rather predictable result -- noise has gone. But still nothing interesting.



Ambient occlusion,add,approximate. Much more interesting.
Those awful shadows have gone, lightning is very cute.
For AO with raytrace the result is very close except noise for small
amount of samples appeared.



environment lightning , approximate, color:white,



and this is stable Blender 2.49b. Rather gloomily Don't you think?
If you switch off color management in Blender2.5 alpha you'll have the same result.



This is also Blender 2.49b
Ambient Occlusion, samples:5, Raytrace, Add, Sky Color

intro

this is blog about 3d , render, maybe about photography... about different things